Numerator of Hermite(n, 2/5).

Terms

a(0) =1a(1) =4a(2) =-34a(3) =-536a(4) =2956a(5) =119024a(6) =-262904a(7) =-36758816a(8) =-55018864a(9) =14483450944a(10) =82692292576